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Hex Fiend vs ImHex: catalog facts
Hex Fiend	ImHex
Free Free and open source under the two-clause BSD licence.	Free Free and open source under the GPL-2.0.
macOS	Linux
Opens huge files without loading them into memory Insert and delete bytes, not just overwrite	Pattern Language for decoding file structures Built-in data analysis and visualization
macOS only Focused on editing rather than full reverse-engineering features	Pattern Language takes time to learn More complex than a basic hex viewer
Downloadable app	Downloadable app
Open source	Open source
License: BSD-2-Clause	License: GPL-2.0-only
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.